This is my rainsensor/tipping bucket for MySensors that works with Domoticz.

It uses 2xAA as power source, a Pro Mini 3.3v with a 0.9 to 3.3 booster.
The bucket has a magnet which triggeras a reed switch which triggers an interrupt pin.
I also use battery sensing with voltage divider.

This is great!
1 year - times fly by, but my rainsensor is going strong!

I just wanted to celebrate 1 year for my Rainsensor on batteries, reporting every hour (or less when it rains). Still going strong and 81% battery left! Except for some range issues in the beginning you can see its working as it should:

Also It will be my (almost) 1000th post so thank you all for making MySensors such a great community. I just love every minute here!

@sundberg84 Just playing with your sketch, because it's easier for my to understand than the one one the build page. I'm curious about how domoticz handles these values. I don't see you reset the hwRainVolume variable. So does this mean that this is an ever increasing value that must be send to Domoticz?

@sundberg84 It's also not a concern of the MySensors node. This should be handled by Domoticz. I really like your sketch, it works like a charm. I modified it to my needs so that I can run the node without the sleep. Still need to think of an hourly heart beat. But almost there.

@AWI do you happen to know if the pulse counter in Domoticz is a 1mm pulse counter? Or is it a real tip pulse counter? Right know where checking whenever the rain fall exceeds 1mm and send a pulse ++ in that case. Meaning we miss some pulse counts when we reset the node.

@AWI (Glad that your back, hope you're doing allright) So, if I understand your setup correctly you don't send the pulse count to Domoticz? I kind of like it, because that way I can reset the rain sensor many times and still keep the rain fall log in sync, without using the EPROM.

And my rain sensor did reset a couple of times. I had to put a diode (Dutch name is blus diode) between the two wires coming out from the rain gauge to prevent this.

@TheoL (i'm fine, thank you) That is what i'm doing. The only thing what I need to do after a reset is delete the miscalculation in Domoticz (easy). My sensor (oregon) uses a 'reed' switch (no induction). I MySensoriz'ed it without losing the original circuitry and function. (so in parallel).